Quick-change expendable brush for dulling machines



July 2s, 1964 E. F. HARAcz QUISK-Cl-{ANGEA EXPENDABLE BRUSH' FOR DULLING 'NACHI Filed Aug. 14, 1962 lli/A ,y 27.1...

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rimmc United States Patent O 3,142,079 QUICK-CHANGE EXPENDABLE BRUSH FOR DULLING MACHINES Edward F. Haracz, 161 Pershing Ave., Clifton, NJ. Filed Aug. 14, 1962, Ser. No. 216,837 7 Claims. (Cl. 15-77) This invention relates in general to dulling machines wherein one or more rotatable cylindrical brushes rub against glass, aluminum, decorative plastics or other materials carried by fixed anvil rollers, and has particular reference to the structure of the brushes, which must be replaced when worn out, and the mounting means for said brushes.

Prior to my present invention, each dulling brush has been of one-piece construction with a mounting shaft integral with the core of the brush. The opposite ends of the brush shaft are journaled in bearings supported by a stationary housing having means by which said bearings may be adjusted radially toward and away from the related anvil roller. Moreover, driving means, such as gears or pulleys, are operatively connected to one end of each brush shaft. Consequently, replacement of a wornout brush involves dismantling of the bearings and adjusting means at both ends of each brush shaft and of the driving means at one end. This is a tedious operation and, when it is considered that a single dulling machine may mount as many as eight brushes, several hours down time usually has to be suffered While making the replacement of a set of brushes, which wear out in about two days.

With the above-enumerated disadvantages of the prior art brush mounting means of dulling machines in mind, it is my primary object to provide an improved expendable brush with quick-change means by which each brush may be removed and replaced without having to dismantle the bearings, adjusting means and driving means therefor.

The above stated and other objects will become apparent from a reading of the following description of an illustrative embodiment of the invention in connection with the accompanying drawings thereof, in which drawings:

FIG. 1 is a vertical cross-sectional view of a dulling machine equipped with the expendable brush and quickchange mounting means therefor constructed according to the present invention, showing the brush firmly installed; and

FIG. 2 is a similar view, showing the draw-bolt disconnected from its anchorage in the headstock arbor and j with the arbor or the tailstock in retracted position to release the brush to be replaced.

Like characters of reference are applied in the above described views of the brush mounting device of this invention to indicate corresponding parts thereof.

Referring now in detail to FIG. l of the drawings, the numeral 1i) indicates the housing of a dulling machine of conventional general construction. The respective front and rear walls 11 and 12 of housing 10 are pierced at 13 and 14, respectively, for penetration by the opposite end portions of the arbors of improved brush assembly 15. j

This brush assembly 15 includes a cylindrical dulling brush 16 and respective headstock and tailstock subassemblies 17 and 18 to replaceably mount said brush in housing 1t) in axial parallelism to conventional anvil roller 19 for operational rubbing Contact therewith. Dulling brush 16 includes a tubular core 20.

Headstock sub-assembly 17 includes a first arbor 21, to which is applied the keyed gear 22 of conventional driving means (not shown). It is to be understood that equivalent means, such as a pulley, may be substituted ICC for gear 22 within the scope of the invention. First arbor able toward and away from anvil roller 19 by rotation of 21 is journaled in a first bearing 23 that is radially adjustadjusting screw 24 that has screwthreaded engagement with block 25 carried by housing 10, the lower end of screw 24 being swiveled in its connection with said first bearing. In the area where first arbor 21 pierces housing wall 12 at 14, sufficient clearance is afforded for normal degrees of adjustment of first bearing 23.

The inner end of first arbor 21 is provided with an enlarged disk-like head 26 which has an inwardly tapered peripheral seating face 27 for wedging engagement within the corresponding end of core 20 of brush 16. A radial limiting flange 28 is provided axiallyfoutward from seating face 27 for abutment against the adjacent end of core 20. A screwthreaded central anchoring bore 29 opens through the inner end of first arbor 21. The inner end of bore 29 is flared at 30 to provide a centering guide for a purpose which will appear as the description progresses. i

Tailstock sub-assembly 18 includes a second arbor 31 that is journaled in a second bearing 32, which is adjustable rad-ially toward and away from anvil 19 by adjusting screw 33 carried by casing-supported block 34. The pierced area 13 of casing wall 11 affords sufficient clearance for normal degrees of adjustment of second bearing 32. Like first arbor 21 of headstock sub-assembly 17, second arbor 31 is provided with an enlarged disk-like head 35 having an inwardly tapered peripheral seating face 36 and axially outward radial limiting fiange 37 for abutment against the corresponding end of brush core 20.

Second arbor 31 has a smooth axial through bore 38 for rotational and axial sliding movement of a drawbolt 39 ltherein. The inner end of draw-bolt 39 is screwthreaded for adjustable engagement with screwthreaded anchoring bore L29 of first arbor 21, and a clamping head 40 is provided on its outer end for abutment against the outer end of second arbor 31. Head 40 is shaped for application of a wrench or other turning tool (not shown). A lock washer 41 is Iinterposed between head 40 and the outer end of second arbor 31. The length of draw-bolt 39 is such that it will clamp the core 20 of brush 16 rmly between fianges 28 and 37, respectively, of the heads 26 and 35 of first and second arbors 21 and 31. For cooperation with centering guide 30 in bore 29 of first arbor 21, a tapered centering point 42 is provided on the inner end of draw-bolt 39.

To aid in separating the respective heads 26 and 35 of first and second arbors 21 and V31 for the purpose of releasing a worn brush 16, a hammer 43 is secured to draw-bolt 39 in rather widely axially spaced relation to head 35 of second arbor 31. Hammer 43 is preferably annular in form so as to be counterbalancing in relation to draw bolt 39 in order that said hammer cannot cause accidental unscrewing of said draw-bolt from anchoring engagement with bore 29 of first arbor 21. Split locking rings 44-44 are snapped into circumferential slots provided in draw-bolt 39 at opposite sides of hammer 43 to attach said hammer in axially fixed position on drawbolt 39.

Operation When it becomes necessary to replace a worn brush 16, the driving mechanism of the dulling machine is stopped and draw-bolt 39 is unscrewed from anchoring engagement with first arbor 21 of headstock 17. Then, draw-bolt 39 is given a quick thrust to the left (FIG. 2) to cause hammer 43 to strike head 35 of second arbor 31 of tailstock 18 with sufficient force to break the frictional fit of the opposite ends of core 20 .of brush 16 with tapered seating faces 36 and 27 of the respective heads 35 and 26 of second and first arbors 31 and 21. When this has occurred, brush 16 can be warped laterally outward around the detached inner end of draw-bolt 39 into released condition. A serviceable replacement brush now can be warped around the detached inner end of draw-bolt 39 in reverse direction into axial alignment with first and second'arbors 21 and 31. After fitting the inner end of the new brush over tapered seating face 27 of head 26 of first arbor 21, draw-bolt 39 is pushed inwardly until centering point 42 thereon contacts fiared centering guide 30 of head 26 of first arbor 21 and guides the screwthreaded inner end of said draw-bolt into operative engagement with the screwthreads of anchoring bore 29 of said first arbor. After placing the left end of core 20 of brush 16 in seated relation to head 35 of second arbor 31, draw-bolt 39 is screwed tightly into clamping relation to said brush, in which position it will be locked by washer 41. The complete operation of replacing a worn brush can be performed without any dismantling of the bearings, bearing adjustment means, and driving mechanism associated therewith, such as has been required in connection with dulling machines of prior art construction, and it can be performed in a fraction of the time. A further advantage of the improved brush mounting structure is the absence of any need for storage or transportion of the worn brushes. They are simply scrapped. It isa one-way operation.

While the invention has been illustrated and described with respect to a particular embodiment thereof, it will be understood that it is intended to cover all changes and modifications of the embodiment shown which do not constitute departures from the spirit of the invention and scope of the appended claims.

I claim:

1. In a dulling machine, the combination of: a housing having laterally spaced apart side walls; and a demountable brush assembly including a headstock subassembly mounted on one side Wall of the housing and provided with a first bearing, a rst arbor journaled in said rst bearing in non-axially movable relation thereto, and driving means for said first arbor; a tailstock subassembly including a second bearing mounted on the opposite wall of the housing in axial alignment with said first bearing, and a second arbor journaled in said second bearing in axial alignment with said first arbor; the inner ends of said first and second arbors being relatively spaced axially; an expendable dulling brush, removable from said dulling machine in a direction normal to the axis of said bearings, said brush including a tubular core; said second arbor being axially slidable in said second bearing; radially enlarged heads provided on the inner ends of the respective first and second arbors and having axially inwardly facing opposed seats for coupling engagement with the corresponding ends of the brush core; and releasable means to draw said second arbor inwardly through the second bearing toward said first arbor to clamp the dulling brush in operative assembled position therebetween, the retraction of said releaseable means effecting disconnection thereof from coupled relation to said first arbor, whereby to permit released retraction of said second arbor from normally engaged relation with the core of the dulling brush, and thus to disengage the latter subject to removal from coupled relation to and between the first and second arbors, without necessity for dismounting the said bearing members from the housing.

2. The invention defined in claim 1, wherein the first arbor has a screwthredaed central anchoring bore opening through its inner end; wherein the second arbor has a smooth through bore; wherein a draw-bolt is mounted for rotation and axial sliding movement in the bore of said second arbor; wherein anchoring screw threads are provided on the inner end of said draw-bolt for engagement with the threads of the bore of said first arbor; and wherein a clamping head is provided on the outer end of the draw-bolt for inwardly thrusting abutment against the outer end of said second arbor and has means for appli` cation of a turning tool thereto.

3. The invention defined in claim 2, wherein the inner end of the bore in the first arbor is flared to provide a centering guide mouth for in-guiding reception of the inner end of the draw-bolt.

4. The invention definedA in claim 3, wherein the inner end of the draw-bolt has a tapered guiding nose for cooperation with the flared mouth of the bore of the stationary first arbor.

5. The invention defined in claim 1, wherein the first arbor has a screwthreaded central anchoring bore opening through its inner end; wherein the second arbor has a smooth through bore; wherein a draw-bolt is movably mounted for rotation and axial sliding movement in the bore of said second arbor; wherein anchoring screw threads are provided on the inner end of said draw-bolt for engagement with the threads of the bore of said first arbor; wherein a clamping head is provided on the outer end of the draw-bolt for abutment against the outer end of said second arbor and has means for application of a turning tool thereto; and wherein a hammer head is provided on the said draw-bolt in axially spaced relation to the inner end of said second arbor, whereby axial outward movement of said draw-bolt will knock said second arbor loose from seating engagement with the core of the expendable brush after the inner end of said drawbolt has been vreleased from said first arbor.

6. The invention defined in claim 5, wherein the hammer head is an annular member fixedly secured to the draw-boit in encircling relation thereto.

7. The invention defined in claim 1, wherein the enlarged heads on the inner ends of the respective first and second arbors have inwardly tapered annular seating faces for engagement within the corresponding ends of the tubular core of the expendable brush and have peripheral radial limiting flanges located axially outward with respect to said tapered seating faces for abutment against the corresponding ends of said brush core.

References Cited in the file of this patent UNITED STATES PATENTS 929,599 Key July 27, 1909 1,281,777 Hardy Oct. 15, 1918 1,482,744 Heffernan Feb. 5, 1924 1,883,747 Maddox Oct. 18, 1932 3,120,018 Lanstrom Feb. 4, 1964 FOREIGN PATENTS 23,778 Great Britain Dec. 7, 1894 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3, 142079 July 28V 1964 Edward Fo Haracz It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2l line 2 strike out "able toward and away from anvil Toller 19 by rotation of" and insert the Same after "adjuStJ in line 3,1 same column 2,; Column 4v line lv for "Sfsrewtbredaed" read Screwthreaded Signed and sealed this 17th day of November 1964.o

(SEAL) Attest:

ERNEST w. swTDEEI EDWARD J.l BREMIEIy Attestng Office; Commissionerl of Patentsl 

1. IN A DULLING MACHINE, THE COMBINATION OF: A HOUSING HAVING LATERALLY SPACED APART SIDE WALLS; AND A DEMOUNTABLE BRUSH ASSEMBLY INCLUDING A HEADSTOCK SUBASSEMBLY MOUNTED ON ONE SIDE WALL OF THE HOUSING AND PROVIDED WITH A FIRST BEARING, A FIRST ARBOR JOURNALED IN SAID FIRST BEARING IN NON-AXIALLY MOVABLE RELATION THERETO, AND DRIVING MEANS FOR SAID FIRST ARBOR; A TAILSTOCK SUBASSEMBLY INCLUDING A SECOND BEARING MOUNTED ON THE OPPOSITE WALL OF THE HOUSING IN AXIAL ALIGNMENT WITH SAID FIRST BEARING, AND A SECOND ARBOR JOURNALED IN SAID SECOND BEARING IN AXIAL ALIGNMENT WITH SAID FIRST ARBOR; THE INNER ENDS OF SAID FIRST AND SECOND ARBORS BEING RELATIVELY SPACED AXIALLY; AN EXPENDABLE DULLING BRUSH, REMOVABLE FROM SAID DULLING MACHINE IN A DIRECTION NORMAL TO THE AXIS OF SAID BEARINGS, SAID BRUSH INCLUDING A TUBULAR CORE; SAID SECOND ARBOR BEING AXIALLY SLIDABLE IN SAID SECOND BEARING; RADIALLY ENLARGED HEADS PROVIDED ON THE INNER ENDS OF THE RESPECTIVE FIRST AND SECOND ARBORS AND HAVING AXIALLY INWARDLY FACING OPPOSED SEATS FOR COUPLING ENGAGEMENT WITH THE CORRESPONDING ENDS OF THE BRUSH CORE; AND RELEASABLE MEANS TO DRAW SAID SECOND ARBOR INWARDLY THROUGH THE SECOND BEARING TOWARD SAID FIRST ARBOR TO CLAMP THE DULLING BRUSH IN OPERATIVE ASSEMBLED POSITION THEREBETWEEN, THE RETRACTION OF SAID RELEASEABLE MEANS EFFECTING DISCONNECTION THEREOF FROM COUPLED RELATION TO SAID FIRST ARBOR, WHEREBY TO PERMIT RELEASED RETRACTION OF SAID SECOND ARBOR FROM NORMALLY ENGAGED RELATION WITH THE CORE OF THE DULLING BRUSH, AND THUS TO DISENGAGE THE LATTER SUBJECT TO REMOVAL FROM COUPLED RELATION TO AND BETWEEN THE FIRST AND SECOND ARBORS, WITHOUT NECESSITY FOR DISMOUNTING THE SAID BEARING MEMBERS FROM THE HOUSING. 